| Value | Category | Cases | |
|---|---|---|---|
| 1 | Are taken directly from establishment records | 64 |
43.5%
|
| 2 | Are estimates computed with some precision | 55 |
37.4%
|
| 3 | Are arbitrary and unreliable numbers | 13 |
8.8%
|
| 4 | Are in some case taken from books and in some case estimates | 15 |
10.2%
|
| Sysmiss | 2 |